DYK: Demolition Techniques

24 Jul 2018

Demolition Techniques

by Sasha Anderson | posted in: Construction Chat, Did You Know, General, Safety | 0

Demolition Techniques

You may assume demolition is simply blowing things up. Some involve explosions but it is however way more technical than that. There are various demolition techniques that are considered as ‘demolition’.

It must be noted that before any demolition takes place the following practices need to be completed according to The Constructor

1. Surveying
2. Removal of hazardous materials
3. Preparation of plan
4. Safety measures

Taking the above into account the following (according to Civil Engineering News) are selected.

1. Non Engineering Demolition also known as Manual.

a) Refering to tools such as Sledge Hammers, Jack Hammers and Drillers which are used by workers.

2. Engineering Demolition which is split into 3 categories.

a) Mechanical Method:

Wrecking Ball (think Miley Cyrus but without the theatrics)

Pusher Arm technique (a specialised hydraulic arm used for smaller buildings)

Thermic Lance Technique (using flaming temperatures of 2500 ⁰C to melt reinforcement)

Non-Explosive (drilling and filling with expanding slurry)

Concrete Sawing

Deliberate Collapse (significant structural items are removed)

Pressure Jetting (thanks to H²0)

b) Implosion: Inward disintegration using explosives

c) Deconstruction: Non-structural and structural

Demolition encompasses many techniques and is often used in conjunction with new construction or renovation.

In conclusion, I’ll take inspiration from Rumi, ‘In this life many demolitions are actually renovations.’

If you are interested in becoming one of our subscribers, please visit Leads 2 Business for more information on demolition tenders.
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About Sasha Anderson

Millennial Mom + wife living the hash-tag life. Reach out if you want to talk: L2B, social media, construction, technology, marriage, parenting, popular culture and travel. Remember: If You Fail - Fail Forward

20 Jul 2018

Industry Events: Key Principles of Tendering Workshop and Global Trade Show

by Sasha Anderson | posted in: Construction Events | 4

Industry Events: Key Principles of Tendering Workshop and Global Trade Show

Event:

Key Principles of Tendering: Workshop

Date:

25 to 26 July 2018

Event location:

Johannesburg

Event Description:

South Africa’s premier masterclass on how to submit compliant and winning tenders. This workshop has now been presented to more than 2,000 delegates and with the on-going changes in the tendering legislation companies are advised to continue to align, not only their bids but also their sub-contracting processes with these regulations.

Contact Details:

Tel: +27 11 026 4891
E-mail: advisor@taranisco.info

Event Details:

Website
Booking

Event:

Global Trade Show

Date:

27 to 29 July 2018

Event location:

Gallagher Convention Centre, Midrand, Johannesburg

Event Description:

GTS (Global Trade Show) South Africa is the largest B2B event in JHB, SA. 600 exhibitors and 10,000 visitors from more than 40 countries will participate in this event.

Contact Details:

Tel: +27 11 452 5728
E-mail: agy@gtsshow.com

Event Details:

Website
Pre-registration
Booking

If you are interested in becoming one of our subscribers, please visit our website.
To view notes with screenshots on how to use our website, please visit our Wiki site.
To view more articles, please visit our blog.

About Sasha Anderson

19 Jul 2018

Why do buildings get demolished?

by Gudrun Anke | posted in: General | 0

Why do buildings get demolished?

Why do some aging, often sizable buildings in cities and suburbs face demolition while others are saved?

What determines the life span of a building? Whether a shopping center, a school or library, an apartment, an office building or a government administrative office?

What does the word ‘demolition’ mean?

I think we can safely say that it is the complete elimination of all parts of a building at a specific location and time – typically it is the end of life for the building.
It is interesting to note that partial demolition begins during the life cycle of buildings as maintenance and adaptation including the replacement of building parts result in a size-able waste factor.
Over a very long life-span the waste factor has been known to exceed demolition waste.

Here are the top reasons why buildings get demolished:

The structure and form of the building is outdated or old. Some buildings are unsafe due to lack of building control. While some problems are fixable, it is often too costly to repair an unstable foundation.

Political transformation processes are often accompanied by destruction and demolition such as the demolition of certain monuments in South Africa as they represented a certain era in South African history that are no longer popular today.

The function of a building for example a building becoming obsolete IE it can no longer perform its function because increased physical deterioration has rendered it useless.

The costs of renewing the infrastructure (streets, sewage, green space, etc.) resulting in developers favoring replacement after demolition instead of renovation

The application of building codes and regulations to existing buildings for example “green space”. This often entails expensive alterations which can make compliance through demolition and rebuilding a cheaper or more profitable option.

Plans to sell a vacant plot especially if the building on it is not in a good condition.

The Building contains dangerous materials. Older buildings may contain enough dangerous materials, such as asbestos, that require full or partial demolition

Sources:
www.simcatgroup,com.au
www.realtreeinc.com
www.grantmackaydemolition.com
www.washingtonpost.com

About Gudrun Anke

I am an Account Executive for Leads 2 Business who assists professionals, contractors, sub contractors and anyone needing to learn about new projects and tenders in the construction industry and help build their business by getting more clients. Before Leads to Business, I spent well over ten years in the fashion industry and after a successful career designing and managing fashion brands I decided it was time to make a change and entered the construction sector. I enjoy trying new sports (archery, anyone?) and am a mom.

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18 Jul 2018

Featured Project: Construction of a cement grinding plant in the Coega Industrial Zone

by Michelle Crosby | posted in: Featured Project | 4

Construction of a cement grinding plant in the Coega Industrial Zone

Description

Construction of a cement grinding plant in the Coega Industrial Zone, Nelson Mandela Bay Municipality, Eastern Cape. The cement grinding facility will be located along Neptune Road within Zone 5 of the Coega Industrial Zone which is 6km east of the town Motherwell, Port Elizabeth. Estimated value: R350 million

Status	Region
Underway	Eastern Cape
Category	Value
Building	R350 Million
Industry	Timing
Industrial	August 2017 to August 2018
Sector	Class
Private	Invited / Negotiated

If you are a valued Projects subscriber, you can find more details about this Project here
If you are interested in becoming one of our subscribers, please visit our website.
To view notes with screenshots on how to use our website, please visit our Wiki site.
To view more articles, please visit our blog.

About Michelle Crosby

I started my journey at Leads 2 Business in the Directory Department in 2012. I was then promoted to the Private Projects Department in 2014 and was recently promoted to Projects HOD this year.

17 Jul 2018

Featured Tender: Appointment of three(3) Qualified Electrical Contractors for Emergency Work

by Sonet van Wygaard | posted in: Featured Tender | 0

Appointment of three(3) Qualified Electrical Contractors for Emergency Work on the KSDLM Overhead and Underground Electrical Network at Various Locations within KSDLM

Contract Number:

SCM:002/2018/19 – king Sabata Dalindyebo Local Municipality

Description:

Appointment of three(3) Qualified Electrical Contractors for Emergency Work on the KSDLM Overhead and Underground Electrical Network at Various Locations within KSDLM

Category	Industry
Electrical & Instrumentation	Institutional
Region	Site Inspection
Eastern Cape	2018-07-20 10:30 AM
Closing Date	Contract Period
15 August 2018 at 12:00	No Details

If you are a valued Tender subscriber, you can find more details about this Tender here
If you are interested in becoming one of our subscribers, please visit our website.
To view notes with screenshots on how to use our website, please visit our Wiki site.
To view more articles, please visit our blog.

About Sonet van Wygaard

I started working at Leads 2 Business in 2014. I was part of the Tenders Africa team and moved to Projects in 2019. I love every second of it!

16 Jul 2018

Tips for Blasting

by Karen Garner-Savory | posted in: Did You Know | 0

Tips for Blasting

Firstly we need to know what blasting is. It is a technically controlled, effective and safe way to break rock for excavation. It is primarily used in Civil Engineering, Mining and Quarrying for roads and dam construction.

What explosives are used for blasting?

It is a common misconception that dynamite or gunpowder are used for most blasting activities but it is rather the engineered blasting agents that account for approximately 90% of explosive material used.
Ammonium Nitrate mixed with either sodium nitrate or calcium nitrate is the most common product and pound for pound the more effective explosive.

What is involved in Blasting?

• Holes are drilled into the rock and filled with explosives. The more solid the rock the more explosives will be needed.
• Proper ventilation is required to remove not only the dust but also the combustion gases from the explosion. This needs to be done before work can be resumed.
• The rock then collapses once detonation takes place.
• The debris is removed and if need be reinforcing is put in place before further work takes place.
• The entire blast lasts up to 1 second.

Steps to be considered before blasting takes place:

• Fragmentation desired – take into consideration size of digging equipment and crushing equipment needed on the project.
• Rock quality/character – state of the area being blasted, is the rock hard or soft and is the area dry or wet.
• Site limitations – is the area to be blasted near other structures or properties.
• Safety limitations – are there any electrical hazards
• Equipment limitations – are all equipment needed for the project available

Random facts about blasting

• Blasting is now considered routine work in the mining industry.
• Geological or Geotechnical knowledge is needed to ensure effectiveness and safety.
• Blasting involves design and patterns, not just “blowing” stuff up…
• The result of rock blasting is often called rock cut.
• Mining and Construction are the 2 most common uses for explosives.

Sources:
www.wikipedia.org/wiki
www.railsystem.net
www.miningandblasting.wordpress.com

About Karen Garner-Savory

I started working at Leads 2 Business in May 2009, and have served as Head of Department of Telesales and Administration from 2010 until the present. I oversee both the Telesales department as well as the Administration of our Johannesburg Office.

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13 Jul 2018

Industry Events: Affordable Housing Africa, Smart Procurement World Kwa-Zulu Natal Conference & Expo and Power Gen & DistribuTech Africa

by Sasha Anderson | posted in: Construction Events | 0

Industry Events: Affordable Housing Africa, Smart Procurement World Kwa-Zulu Natal Conference & Expo and Power Gen & DistribuTech Africa

Event:

Affordable Housing Africa

Date:

16 to 18 July 2018

Event location:

Cape Town Marriott Hotel Crystal Towers, Cape Town

Event Description:

This highly-interactive and information packed event will highlight case studies from some of the finest and at the same time provide an excellent networking platform for the public and private sectors, global professionals and industry leaders who are all directly involved with the growth and development of affordable housing, enabling Africa to take itself to the next stage of development.

Contact Details:

Tel: 603-27236745
E-mail: MaheswariG@marcusevanskl.com

Event Details:

Website

Event:

Smart Procurement World Kwa-Zulu Natal Conference & Expo

Date:

17 to 19 July 2018

Event location:

Durban ICC, Durban

Event Description:

The conference will examine finer procurement and supply chain innovations compatible with organisational goals and policies.

Contact Details:

Tel: +27 72 386 9986
E-mail: debbiet@smartprocurement.net

Event Details:

Website
Pre-registration

Event:

Power Gen & DistribuTech Africa

Date:

17 to 19 July 2018

Event location:

Sandton Convention Centre, Johannesburg

Event Description:

This event showcases products like power plant technology,Digital Technology Revolution,Utlity Management,Renewable Energy Technologies etc. in the Power & Energy industry.

Contact Details:

E-mail: ellac@pennwell.com

Event Details:

Website
Pre-registration

About Sasha Anderson

12 Jul 2018

Top Demolition Projects

by Antonette Claassens | posted in: Featured Tender | 4

Top Demolition Projects

When it comes to tearing things down, you need to make absolutely sure, that you never ever need or want to see that thing again… Let’s say, a building…

Demolishing a building may come with good reason, like a condemned building or just an unsafe environment all round.

I am 100% sure nobody ever wants anything in life to go wrong, but, just like anything in life, demolishing a building can be very unpredictable.

A lot can go wrong, even with the most meticulous planning. So much needs to be taken into account when planning to demolish a building.
Even more so if the least amount of damage to the surrounding area and the people involved is a concern.

Just like in rugby, because of the shape of the ball, it can go in the complete opposite direction than is planned. And might just cost you the game.

With this in mind, should it all blow up in the wrong direction, it would probably cost you much more than anticipated. And in some cases damage to someone else’s home and/or work.
This will then also lead to months of unnecessary construction work and relocation of people and/or companies.

Wasting time and money, does not bode well for the future of a company.

So, let us take a look at a disastrous outcome for a demolition project:

And since I would not like to leave you with that sour taste in your mouth, here are some adventurously, successful demolition projects:

Here we can see that some well-planned demolition projects can look absolutely stunning.
It comes with extreme precision, when planning such projects.

We have to keep in mind that where there is demolition in process, there will soon be something more modern and safe built in its place.
It goes to show that in life, we have to take the bad with the Good.

May this give you hope that not all things being demolished end disastrously.

About Antonette Claassens

11 Jul 2018

Featured Project: Hotel and Convention Centre, Swaziland

by Melanie Miles | posted in: Featured Project | 0

Hotel and Convention Centre, Swaziland

Description:

Construction of a five star International Hotel and Convention Centre at Ezulwini in Swaziland. No official name has been given to the new Ezulwini complex, but it is being referred to by planners as the King Mswati III Hotel and Convention Centre. Estimated project value : E1 billion.

Status:

Underway

Category:

Building

Industry:

Hospitality & Leisure

Sector:

Public

Region:

Swaziland

Value:

R100 Million+

Timing:

May 2015 – October 2018.

Class

Open Tender

About Melanie Miles

One girl who would rather wear boots than high heels...

10 Jul 2018

Featured Tender: Consultancy Services for Preparation of RAP VMGP ESIA for Transmission Lines Package 3 Machakos Mwala Salala Malindi Kilifi and Substation Extensions Kyeni Mwingi Malindi

by Pauline Rainbird | posted in: Featured Tender | 0

Consultancy Services for Preparation of RAP VMGP ESIA for Transmission Lines Package 3 Machakos Mwala Salala Malindi Kilifi and Substation Extensions Kyeni Mwingi Malindi

Contract Number:

KE-KETRACO-66986-CS-QCBS – Kenya Electricity Transmission Company Ltd (Ketraco)

Description:

The Government of Kenya has has received financing from the World Bank toward the cost of the Eastern Electricity Highway Project, and intends to apply part of the proceeds for the above-mentioned consulting services. The consulting services (“the Services”) include: Carry out detailed Social Impact studies (Resettlement Action Plan (RAP) and Vulnerable and Marginalised Groups Plan (VMGP for each of the proposed transmission lines, Carry out detailed Environmental and Social Impact Assessment (ESIA) for the proposed transmission lines, The Kenya Electricity Transmission Company Ltd (KETRACO) now invites eligible consulting firms (“Consultants”) to indicate their interest in providing the Services. REoI is invited for all the three assignments simultaneously. Firms may express interest for any one or multiple of the packages. Short listing will be prepared for each package.

Category	Industries
Consultants	Power Grid Institutional
Region	Site Inspection
Kenya	N/A
Closing Date	Restrictions
17 July 2018 at 10:00 (Local Time)	Interested Consultants should provide information demonstrating that they have the required qualifications and relevant experience to perform the Services. This may be demonstrated in the form of brochures, description of similar assignments undertaken, experience in similar conditions, availability of appropriate technical and managerial skills, institutional financial and technical capability…. etc.).. Applicant Firm’s valid professional licence or registration documents or equivalent is also to be submitted with the EoI. The shortlisting criteria are, among others:· Applicant firms’ competence and capability in terms of technical and managerial strength, overall technical experts’ size and mix, financial and institutional strength and good track record in the area of subject consultancy assignment; Satisfactory completion of at least two (2) RAPs for High voltage overhead transmission lines, linear project or large scale infrastructure project that met the requirements of an International Financial Institution within the last eight (8) years preferably in Kenya or in any country of similar social, economic and environmental settings, firms that will demonstrate experience in conducting at least one VMGP will have an added advantage (Relevant completion certificates and/or letters of recommendation from clients MUST be provided). Satisfactory completion of at least two (2) Environmental and social impact assessment studies for high voltage overhead transmission lines, linear project or large scale infrastructure project that met the requirements of an International Financial Institution within the last 8 (eight) years preferably in Kenya or in any country of similar social, economic and environmental settings (Relevant completion certificates and/or letters of recommendation from clients MUST be provided), Relevance of the Firm’s core business area to the assignment including general experience in the consultancy services and implementing Social and Environmental Safeguard standards. Firms that have adequate experience in either Environmental safeguards or Social safeguards but do not meet experience requirements for both, may apply as a joint venture (JV) applicant. At this stage, letter of intent for JV formation or MoU is sufficient for EoI as a JV. Formal JV agreement will be required to be submitted together with the proposals, in case the applicant is short listed and invited for proposals. The attention of interested Consultants is drawn to paragraph 1.9 of the World Bank’s Guidelines: Selection and Employment of Consultants under IBRD Loans and IDA Credits and Grants by World Bank January 2011 (“Consultant Guidelines”), setting forth the World Bank’s policy on conflict of interest. As indicated above, Consultants may associate with other firms in the form of a joint venture or a sub consultancy to enhance their qualifications.

About Pauline Rainbird

I have been working at L2B since March 2011 and my current position is Deputy Head of Department - Africa. When I am not working I am either riding my bicycle or spending time with my dogs.

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